Resources Contact Us Home
Browse by Category: Main > Information Technology
Class Information
Number: 33/491
Name: Geometrical instruments > Straightedge type > Rules > With attachment > Selectable
Description: Subject matter wherein the straightedge is constructed to provide a choice of ruling edges.

Patents under this class:

Patent Number Title Of Patent Date Issued
8438744 Ruler and method of use May. 14, 2013
7415772 Rainbow ruler Aug. 26, 2008
6813841 Measuring device for teaching incremental measurements Nov. 9, 2004
6816805 Computer generated scale and conversion instrument Nov. 9, 2004
6243959 Measuring and instructional ruler Jun. 12, 2001
5881469 Measuring and instructional ruler Mar. 16, 1999
5822875 Scanning electron microscopic ruler and method Oct. 20, 1998
5479719 Rolling ruler Jan. 2, 1996
4839833 Programmable display engineering scale Jun. 13, 1989
4707928 Vari-scale Nov. 24, 1987

  Recently Added Patents
System and method for self service marketing research
Lubricant coating device and image forming apparatus
Method and laser receiver for acoustically indicating a laser beam
Magnetic resonance imaging apparatus
Process for preparing substituted aromatic carboxylic acids
Snapshot isolation support for distributed query processing in a shared disk database cluster
  Randomly Featured Patents
Folder with slide-stiffener assembly
Method for the manufacture of multilayer ceramic electronic component
Gb parameter based radio priority
Surface light source and light guide plate having differently configured dots
Method of controlling the supply of power to electrical loads with a minimum of switching surges
Sheet loading unit and sheet handling apparatus including the same
Compression repair method and apparatus
Method for transmitting messages in an elevator group control system
Capacitors with low equivalent series resistance
Destaticizing and cleaning apparatus